Attributes

Tag Minimization

The start-tag is required for this element. The end-tag is optional, if your SGML declaration allows minimization.

Description

A "callout" is a visual device for associating annotations with
an image, program listing, or similar figure. Each location is identified
with a mark, and the annotation is identified with the same mark. This
is somewhat analagous to the notion of footnotes in print.

An example will help illustrate the concept. In the following example,
the synopsis for the mv command is annotated with two marks.
Note the location of the old and new filenames.

The new filename. The mv
command changes the name of the old file to newfile. If
newfile exists when mv is executed, it will
be replaced by the old file.

Each Callout contains an annotation for an individual
callout or a group of callouts. The Callout points to the
areas that it annotates with ID references.
The areas are identified by coordinates in an an Area or
AreaSet, or by an explicit CO element.

Processing expectations

Formatted as a displayed block.

CallOuts usually generate text that points the reader to
the appropriate area on the object being augmented. Often, these are
numbered bullets or other distinct visual icons. The same icons should
be used in both places. In other words, whatever identifies the callouts
on the object should generate the same icons on the respective
callouts.

In online environments, it may also be possible to establish a linking
relationship between the two elements.

The processing expectations of Callouts are likely
to deserve special consideration for interchange. See Appendix F. This is especially true if your
interchange partners are producing documentation in a medium
that has restricted visual presentation features, such as aural
media or Braille.